Method of manufacturing artificial caoutchouc.



PATENT OFFICE.

TETER BERESIN, OF ST. PETERSBURG, RUSSIA.

METHOD OF'MANUFACTURIN G ARTIFICIAL CA OUTCI-IOUC.

Specification of Letters Patent.

Patented March 10, 1908'.

Application filed January 29, 1907. Serial No. 354,781.

To all whom it may concern:

Be it known that 1, PETER BERESIN, a subject of the Em eror of Russia, and residing at No. 15 namenskaja street, St. Petersburg, in the Empire of Russia, civil engineer, have invented a new and Improved Method of Manufacturing Artificial Oaoutchouc, of which the following is a specification. 1

This invention relates to a method, of manufacturing artificial caoutchouc of a quality practically equal to the natural caoutchouc obtained from He'vear gag (mensz's. This method is carried out as follows: Cod-liver oil or a vegetable oil, preferably sun-flower oil (from Helianthus annuus) is treated in .unpurified, but stale or vapid state, with chlorid of sulfur (sulfurous chlorid) containing as much free chlorin as possiblp, the proportion being 100 portions in wei ht of 011.: 25 portions in weight of the chlori and the treatment being, effected in suitably constructed ap aratuss The chlorin is quickly absorbe by the oil and a s ontaneous increase of temperature takesp ace. When the temperature has risen to 115 (3., the further supply of the sulfurous I I chlorid is interrupted. After the mass has cooled, it is. ex osed for at least 10 days to the influence of the air, preferably, however, some days more because this is favorable for the quality of the product. The mass thus obtained has the color of amber, is elastic, and devoid of taste and smell. It is then ,reduced to small pieces which are dissolved in benzin. To accelerate the solution,- the respective receptacle may be slightly heated,

but not above. 70 .C. After the mass has become completely dissolved, first, matesite 1s added (a substance obtained from the juice of a plant of the species Apocynaceae growing upon Madagascar), and then iso-' prone manufactured from ormula 0 H is added.

Matesite (C- H ',O,) is a tenacious and very adhesive substance, and forms the chief component of the juice of the before-menfusel-oil of the tioned plant. To obtain the matesite from this juice, the latter is poured into a solution of kitchen-salt containing 2 grams of the chlorid of sodium or 100 grams of water, and the-whole is s aken for .about half an hour, the solution of the ChlOIid'Of sodium assuming during this time a whitish-turbid color and a scent like beer.

solution is separated from the juice or mass,

Then the salt-' the solution passing through the meshes, the mass being retained by the same. The latter is now washed in cold water, whereby it loses its adhesiveness and becomes elastic.

vacuum being preferably as near as possible to 100%. By and during this treatment, only the components of the mass are disthe artificial caoutchouc.

To produce isoprene, pure amyl-alcohol .,(C H O) is sli htly heated, and is treated time, air is forced into and through the mix- (SO ceases. There results a compact black mass which then is forced through a lime OaO). The liquor obtained after the solid particles have deposited is subjected to a dry fractionation,, After the light ethers, among) them malic ether, there escapes an oily ody of extraordinarily disgusting smell, upon which as soon as the tem erature has risen to 117 C, isoprene is evelopled and continues to escape until the distl ation is finished and coke remains as residue in the still.

Mixing from which the artificial caoutchouc is produced is efiected as follows: To the solution of matesite in benzinis added the beforementioned amber-colored mass obtained-in the manner above described (and termed, by theinventor, kautscheen pronounced caoutchane), and after these substances have been thoroughly mixed also the isoprene is added; then the whole" mass is passed through a stirringand grinding device (for instance such as known as the system Uhla'nd) and the product so ob veer gag anemia Care should be taken in the last phase of the process thaj;

the benzin in which the before mentione substancehere dissolved is efiected at only a very slight increase of temperature.

with fuming su fur1c acid, While, at the same ture until the development of sulfurous acid the ingredients or components removin preferably by pouring the whole upon a sieve,

After this the mass is reduced to pieces, and is heated, under vacuum, with benzin, the A solved that are of use for the manufacture of v felt-filter and thereafter treated with caustic.

the genuine caoutchouc' obtained from.He- I Having now described my invention what I desire to secure by a patent of the United States is:

1. The method of producing artificial caoutchouc, consisting in treating an oil, as described, with sulfurous chlorid, dissolving the thus obtained mass in benzin, mixing this solution with a solution of matesite and of isoprene in benzin, and removing the benzin from the resulting product, substantially as set forth.

2. The method of producing artificial caoutchouc consisting in treating a vegetable oil, with sulfurous chlorid, dissolving the thus obtained mass in benzin, mixing this solution with a solution of matesite and of isoprene in benzin, and removing the benzin from the resulting product, with the aid of heat, substantially as set forth. i

3. The method of producting artificial caoutchouc, consisting in treating sun-floweroil, with sulfurous chlorid, dissolving the thus obtained mass in benzin, mixing this the thus obtained mass in benzin, mixing this solution, with a solution of matesite and of isoprene 1n benzin, and removing the benzm from the resulting product, under .vacuum and with the aid of very slight heat,

substantially and for the purpose as described.

In testimony, that I claim the foregoing as my invention, 1 have signed my name in presence of two subscribing wltnesses.

' PETER BERESIN.

Witnesses:

CYPRIAN KossoBUDzKI, H. LOVIAGUINE. 

